February 3, 201511 yr Glad the rebuild finished okay -- didn't take all that long after all, so it clearly sped up again. Your plan r.e. the cage replacement is fine -- you're correct that the cable order doesn't matter. IF the parity check is perfect (fingers crossed), then either the data on #15 is good .. or it was already corrupted and the parity reflects that (so any rebuild would have the same problem). No need to speculate ... just get the check done, the cage replaced, and then see where you stand.
February 4, 201511 yr Author My mind is blown. I have no idea what happened here, but I totally had two disabled, red-status drives that have somehow restored themselves. I spot-checked a dozen files on Disk 13 and Disk 15 this morning. Video and audio played perfectly fine, not even any lag in loading. I shut that sucker down until the weekend (when I'll have time to take everything apart and replace the drive cage), but wow... I feel pretty optimistic about those drives now. Of course, I'll be running through and testing every file on both as soon as I find a free weekend (ha!), but I think the vast majority of both drives survived. And that is awesome. Now if my 6TB Preclear wasn't appearing to be on track for a 70-hour Preclear cycle... Ehh, I'll take the small miracles!
February 4, 201511 yr It is indeed strange -- I can only speculate that there was a connectivity issue; but even then UnRAID isn't supposed to "reset" the status without doing a rebuild (which isn't possible with 2 failed drives) !! ... Are you CERTAIN that 15 was showing a red ball? (not just disk errors) In any event, all's well that ends well
February 5, 201511 yr Author CERTAIN. You know how Firefox leaves up thumbnail previews of previously visited sites? For most of the month of January, I had one up for the webgui, with two DISK_DSBL and red balls. It was pretty depressing. Stays off for the better part of a month, boots up, and the disk that was running screamingly hot and is incredibly close to failure (per SMART) or at least old age death (sucker's over 3 years) actually survived long enough to rebuild the one that WAS dead - or at least I think was dead? I'm going to try preclearing that sucker a few times once I confirm I won't need to pull anything off of it w/Reiser. It just seems like an UnRaid Christmas Miracle that waited a little over a month to kick in. I'll take it. I just wish my experience could've helped some others, but I'm OK with going down in history as host to an unraid mystery.
February 5, 201511 yr Strange ... but as you noted, a good thing I would, however, replace #15 SOON before the Ghost of UnRAID Christmas Miracles decides to wreak havoc on you again and you lose data
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